---
layout: docs
page_title: Vault Enterprise Lease Count Quotas
sidebar_title: Lease Count Quotas
description: |-
  Vault Enterprise features a mechanism to create lease count quotas.
---

# Lease Count Quotas

Vault features an extension to resource quotas that allows operators to enforce
limits on how many leases are created. For a given lease count quota, if the
number of leases in the cluster hits the configured limit, `max_leases`, additional
lease creations will be forbidden for all clients until a lease has been revoked
or has expired.

All the nodes in the Vault cluster will share the lease quota rules, meaning that
the lease counters will be shared, regardless of which node in the Vault cluster
receives lease generation requests. Lease quotas can be imposed across Vault's API,
or scoped down to API pertaining to specific namespaces or specific mounts.

Lease count quotas defined in a namespace will be inherited by all the child
namespaces. By extension, this means that a quota that is defined in the `root`
namespace is inherited by all namespaces and mounts, essentially to the entire
Vault API.

Lease count quotas defined on a namespace will take precedence over the inherited
quotas. Lease count quotas defined for a mount will take precedence over inherited
and namespace quotas. The limits on the namespace and mount quotas can either be
increased or decreased. If the inherited quota is very restrictive and if it is
desired to relax the limits in one namespace, or on a specific mount, it can be
done using this precedence model. On the other hand, if the inherited quota is
very liberal and if it is desired to further restrict usages in a specific
namespace or mount, that can be done using the precedence model too.

Vault also allows the inspection into the state of lease count quotas in a Vault
cluster through various [metrics](/docs/internals/telemetry#Resource-Quota-Metrics)
exposed and through enabling optional audit logging.

## Learn

Refer to [Protecting Vault with Resource
Quotas](https://learn.hashicorp.com/vault/security/resource-quotas) for a
step-by-step tutorial.

## API

Lease count quotas can be managed over the HTTP API. Please see
[Lease Count Quotas API](/api/system/lease-count-quotas) for more details.
